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Abstract

Surface plasmon scattering spectra of chemically produced single Cu nanowires were
obtained using a total internal reflection microscope. In particular, we have
observed a strong surface plasmon peak in the far red and a red-shift of the surface
plasmon resonance with increasing nanowire diameter. We believe that the most
reasonable origin for the red-shift of comparably large diameter nanowires is the
phase retardation effect.

Calculated surface plasmon scattering spectra of Cu nanowires and nanospheres:
nanowires by (a) full Mie scattering, (b) first order component only, and (c)
nanospheres by full Mie scattering. For clarity, all the calculated spectra were
normalized by their peak values.